Sinaphaenops Uéno and Wang, 1991

Chen, Mengzhen, Huang, Sunbin & Tian, Mingyi, 2020, A New Species of the Aphaenopsian Genus Sinaphaenops Uéno and Wang, with Notes on Male Genitalia of S. Orthogenys Uéno (Coleoptera: Carabidae: Trechini), The Coleopterists Bulletin 74 (2), pp. 343-350 : 344-345

Genus Sinaphaenops Uéno and Wang, 1991

Sinaphaenops Uéno and Wang 1991: 128 .

Type species: S. mirabilissimus Uéno and Wang, 1991 .

Distribution. Guizhou Province (Guiyang, Liupanshui, Anshun and Qiannan) and Guangxi Zhuang Autonomous Region (Hechi), China. This is the first record of a cave-adapted trechine beetle in Guiyang, Guizhou Province ( Fig. 1 ).

KEY TO SPECIES OF THE GENUS SINAPHAENOPS (modified from Chen et al. 2017)

1. Right mandible tridentate; protibia with a longitudinal sulcus (subgenus Sinaphaenops Uéno and Wang ) ................................ 2

1 ʹ. Right mandible bidentate; protibia without a longitudinal sulcus ............................ 10

2. Body stouter; neck constriction comparatively wide ........................................ 3

2 ʹ. Body slenderer; neck constriction distinctly narrow ............................................. 7

3. Pronotum with pair of lateromarginal setae ................................................ 4

3 ʹ. Pronotum without lateromarginal setae........... 5

4. Lateral margins of pronotum faintly bisinuate before hind angles, which are acute .......... ............................. S. (s. str.) lipoi n. sp.

4 ʹ. Lateral margins not sinuate, hind angles obtuse .................. S. (s. str.) banshanicus Tian, Chen and Tang

5. Three dorsal pores present on third elytral stria ................................................. 6

5 ʹ. Two dorsal pores present on third elytral stria ................................................. 7

6. Sides of pronotum strongly sinuate before hind angles, which are rectangular and pointed ........... S. (s. str.) yaolinensis Tian, Chen and Yang

6 ʹ. Sides of pronotum not sinuate before hind angles, which are rounded ......... S. (s. str.) trisetiger Uéno

7. Body stouter; head with three pairs of frontal pores; neck constriction indistinct; hind angles of pronotum rectangular..... S. (s. str.) mochongensis Tian and Huang

7 ʹ. Body slenderer; head with two pairs of frontal pores; neck constriction distinct; hind angles of pronotum rounded ................ S. (s. str.) orthogenys Uéno

8. Posterior frontal setae absent (individuals from Libo County) or present (individuals from Huanjiang County); aedeagus slenderer, with apical lobe broader ............ S. (s. str.) wangorum Uéno and Ran

8 ʹ. Posterior frontal setae always present; aedeagus stouter, with apical lobe narrower ............. 9

9. Head narrower; lateral margin of elytra in middle visible from above ......... S. (s. str.) gracilior Uéno and Ran

9 ʹ. Head wider; lateral margin of elytra in middle not visible from above .............. S. (s. str.) mirabilissimus Uéno and Wang

10. Pronotum with two pairs of lateromarginal setae; protarsomeres 1 and 2 in male inermous inwards apically (subgenus Dongaphaenops Deuve and Tian ) .......... ........... S. (D.) xuxiakei Deuve and Tian

10 ʹ. Pronotum without lateromarginal setae; protarsomeres 1 and 2 in male spurred inwards apically (subgenus Thaumastaphaenops Magrini, Vanni and Zanon ).... ................................................. 11

11. Elytron with three setiferous dorsal pores but without preapical pore ............. S. (T.) bidraconis Uéno

11 ʹ. Elytron with two setiferous dorsal pores (anterior and middle ones) and with preapical pore ............ S. (T.) pulcherrimus Magrini ,

Vanni and Zanon

Figures

Fig. 1. Distribution of the genus Sinaphaenops. a) S. (Dongaphaenops) xuxiakei, b) S. (Thaumastaphaenops) bidraconis, c) S. (T.) pulcherrimus, d) S. (s. str.) banshanicus, e) S. (s. str.) trisetiger, f) S. (s. str.) mochongensis, g) S. (s. str.) yaolinensis, h) S. (s. str.) orthogenys, i) S. (s. str.) mirabilissimus, j) S. (s. str.) gracilior, k) S. (s. str.) wangorum, l) S. (s. str.) lipoi, new species.